Pocket-audiphone.



PATENTED AUG. '7, 1906.

E. W. SCHNEIDER.- POGKET AUDIPHONE.

APPLICATION FILED mm. a. 1905.

awn/newton Q W t-M @000 o UNITED STATES PATENT oF-Fron Specification(Sf-Letters Patent.

Original application fllednugust 11, 1906,.Serial No. 274,017. Dividedand this v No- 290.981-

Patented Aug. 7,1906.

application filed December 8, 1905/ Serial To all whom it may consent:

' caring, .by means of structed the .Be it known that I, EUGENE WILLIAMSCHNEI ER, acitizen of the United States residing in the borou hofaManhattan, city, county, and State 0 New York, have in-' ventedcertain new and useful Improvements in Pocket-Audiphones, ofwhichthefellowing is a specification, this being a division 0 application filedAugust 11, 1905, Serial No. 274,017.

- My invention relates to improvements in ocket-audiphones for aidingthe deaf in which such audiphones may be made more eompact'and smplified, so as to do away with a multiplicity of loose connections,which complicate the instrument and makeit unhandy for pocket use.

In pocket audiphones as usually conbattery is detached fromthetransmitter and is connected to it by conducting-cords which are subjectto strains or may become twisted to such an extent that they arefrequently broken and the'usefulness of the instrumentis destroyed. Inorder to remedy th s defect, I place the battery'in a rigid casepractically closed at one end, so that they cells may be maintainedsolidly against this end by a restraining I member placed at'thel'otherendand the between the two transmitter being I connected to"the-closed.

end of the'case 1n such manner that. the battery and thetransmitterfform substantially one solid body, the electricalconnections being rigid and reduced to theirsimPlest fixprssion.

The accom anying drawings show an apparatus suita le to the carrying outof my invention, although I do not limit myself to the exactconstruction shown, as changes. may be made in the apparatus withoutchanging its mode of operation or the-effect produced.

Figure 1 is a cross-section through the battery, showing the transmitterin lace with its connections with the cells-an earpiece, the front beingremoved and the earpiece being shown in'section. Fig. 2 is a plan viewbattery-casewith the Fig. 3 is a partial rear elevationoftheapparatus,.showing the transmitter in place with outside flexibleconnections to t e earpiece Figs. 4 and5 show modifications in themannerof interrupting the current.

The device. consists of battery-case .1,

is attached to the other -from which it is properly lnsu latcd, andleads closed at one end and divided into two compartments of sufiicientsize to'hold the cells. transmitter. 2 is connected to the 'case and tothe cells by means of metallic screws 3 and 4. An ear iece or receiver 5is connected to the transmitter by the usual wiring. The bat teries aremaintained inplace' by means of a spring be detached when placed. v

i The operation of the device will be easily understood. The currentdeveloped in the I passes through the upper batteries. '19 and 20 end ofthe battery-case, through screw 3, and hence to screw 10., which formsan outer binding-post to which the wire 11, leading .to the earpiece, is"attached. This wire properly divided distributes the current. between.the electromagnets of the earpiece,'iwhich are thus connected inparallel. The cur- .rent then passes out of the magnets through theleading-out wires, as shown on Fig. '1. These wires are connected withone of the plates of a switch 12, the closing member of which is'theknife 13. Thereturn-wire '14 late of the switch,

the current to binding-post 15, which extends through the metallic backof the transmitter and from which it is insulated; The circuit continuesfrom binding post 15 6, which slides under screw 7 and may. the cellsare to be re-j he top of the battery-case is closed, and the throughinternal wire 16 to electrode 17.

From the electrode the current passes to the diaphragm and fromthe-diaphragm to the metallic back of the'transmitter, then from screw18 to screw 4, and back to the negative 1 end of the battery 19. I

The manner in which the sound-waves striking the dia hragm of thetransmitter are reproduced tot e car by the receiver will be easilyunderstood.

I have shown a current-interrupter in the earpiece; but this maybeplaced in any con venient point of the circuitas, for instance, in thewires connecting the transmitter tothe earpiece, as shown in Fig. 5,where wire 14 is provided with female plug 22and male plug 23. -To close.the circuit, plug 23 is placed iii-plug 2.2. When the plugs'are dis-'connected, the current may also be interrupted by placing doublemale-and female plugs at some point of the cord connection between thetransmitter and the earpiece, as shown. in Fig. 5. It will easily beunderstood that and batteries.

a by pulling the male plugs out of contact the thereto, rigid electricalconnections between current Will be .broken, the earpiece becomthebattery and the transmitter, a-receiver, ing entirely detached-fromthetransmitter and flexible connections connecting the receiver directly tothe transmitterf- I I do not claim any special kind of trans- In Witnesswhereof I affixmy signature in or ealrpiece. the presence of twoWitnesses;

In a. pocket audiphone', a battery-case EUGEM M SOHALIDM" made ofinsulating material and containing I a battery, atransmitterrigidlyattached to one end of the battery-case and exteriorWitnesses:

RR. MENEN, J. T. VAN 'LoAN.

